import numpy as np
a1=np.array([[10,20,30],[40,50,60]])
a2=np.array([1,2,3])
print('a1与a2相加:\n',a1+a2)
a3=np.array([[1],[2]])
print('a1与a3相加:\n',a1+a3)
a4=np.array(5)
print('a1与a4相加:\n',a1+a4)